As a general rule, arrive at the airport no later than two hours before your domestic flight is scheduled to depart. This is somewhat later than the typical suggestion of three hours for an international flight.
Oxford: Annual Weather Averages. July is the hottest month in Oxford with an average temperature of 16Â°C (61Â°F) and the coldest is January at 4Â°C (39Â°F) with the most daily sunshine hours at 9 in June.
London: Annual Weather Averages. July is the hottest month in London with an average temperature of 19Â°C (66Â°F) and the coldest is January at 7Â°C (45Â°F) with the most daily sunshine hours at 8 in July. The wettest month is October with an average of 71mm of rain. Loading weather data.